A numerical procedure to predict vibration and acoustic noise due electromagnetic excitation forces in an axial flux motor (AFM) is presented applied a with ferrite magnets for electric vehicles. The methodology includes the calculation of radial magnetic exerted on stator inner surfaces using solver account motor. Fundamental high-order harmonics are then obtained via fast Fourier transform process. Structural analyses such as modal harmonic analysis conducted investigate natural resonant...

This letter presents a position sensorless control method of brushless dc (BLDC) motors considering unbalanced zero-crossing detection back electromotive force (back EMF). The point (ZCP) EMF voltage is detected by comparing the dc-link with voltage. ZCP caused drop, offset voltage, and motor having asymmetric EMFs. Because BLDC based on detection, issues torque ripple current may be increased. Therefore, operation unstable. In this study, an improved simple compensation algorithm using...

This paper presents the design process of permanent magnets to enable a wide range constant-power operation and reduce torque ripple by using analytical numerical methods in PMA-SynRM. For operation, minimum d-axis flux-linkage magnet is designed be close zero. Moreover, unbalanced flux density each segment adjusted changing size ripple. Finally, control simulations experiments will conducted prove validity suggested process.

This paper presents the optimal rotor design method in a single-phase line-start permanent magnet motor (LSPM) considering starting torque and efficiency. To consider nonlinear characteristics, process is comprised of FEM analytical method. During this study, permanent-magnets cage bars were designed using magnetic equivalent circuit barriers that control all flux FEM, tradeoff efficiency controlled by weight function Taguchi simulation. Finally, performance model compared with those...

The variable reluctance (VR) resolver is generally used instead of an optical encoder as a position sensor on motors for hybrid electric vehicles or owing to its reliability, low cost, and ease installation. commonly conventional winding method the VR has disadvantages, such complicated unsuitability mass production. This paper proposes improved that leads simpler better suitability production than method. In this paper, through design finite element analysis two types output methods,...

This paper proposes a vacuum pump motor capable of high-speed, high-torque operation as part domestic production strategy where high-speed is essential. It introduces 6Phase motor, modified from the existing 3Phase which reflects increased voltage utilization characteristics Multi Phase systems. By using it possible to reduce line usage compared conventional motors and increase base speed, thereby enabling high torque at speeds. Additionally, use results in generation 3n-order harmonics...

This paper proposes a design and control process for dual-phase motors (DPM) aimed at independent drive. To achieve drive, different pole numbers are used the inner rotor outer of dual-rotor (DRM). Additionally, special winding method is selected to allow operate independently on single stator. Through this method, only linked current driven. The motor uses combined synthesized from 3-phase 6-phase currents, so ratio period based electrical frequency determined. By selecting ratio, similar...

The calibration of traffic microsimulation models has received widespread attention in transportation modeling. A recent concern is whether these can simulate conditions realistically. deployment intelligent systems North America provided an opportunity to obtain traffic-related data. In some cases the distribution data rather than simple measures central tendency such as mean, available. This paper examines a method for calibrating so that simulation results, travel time, represent observed...

In the case of designing high-speed surface-mounted permanent magnet synchronous motor (SPMSM), rotor retaining sleeve is inserted into to prevent magnet's damage. It quite an efficient way consider manufacturability, but becomes major source ohm loss in operation. this paper, for a turbo blower at rating 100 kW, 20000 r/min was introduced. To improve its efficiency, sleeve's optimal design needed. For this, parametric analysis on shape carried out different type motor. Within range that...

In this paper, a method for predicting vibrations due to an electromagnetic force from among the other types of that occur in electric motor is proposed. Among forces, forces applied radial direction were separated into their spatial and temporal harmonic components developing vibration-prediction method. Each densities acts as vibration source generates combined with mechanical characteristics motor. The separation sources makes it possible predict magnitude velocity occurring This enables...

Axial-flux permanent-magnet synchronous motors (AFPMSMs) have a higher torque density than radial-flux (RFPMSMs); therefore, AFPMSMs are widely used in high-power and high-efficiency motors. However, the case of AFPMSMs, three-dimensional production is limited, less mass available, unit cost high because shape motor implemented by rolling amorphous electrical steel sheet or molding soft magnetic composite (SMC) to manufacture motor. Therefore, this paper, 3D-printed AFPMSM proposed, which...

Transit signal priority (TSP), which has been deployed in many cities North America and Europe, is a traffic enhancement strategy that facilitates efficient movement of transit vehicles through signalized intersections. Most TSP systems, however, do not work well networks with nearside bus stops because the uncertainty dwell time. Unfortunately, most on U.S. arterial roadways are ones. In this research, weighted-least-squares regression modeling was used to estimate stop time and, more...

Permanent magnet (PM) synchronous motors (PMSMs) have been used to drive a number of vehicles. They high torque density, efficiency, and wide speed range. However, the cost PMs is disadvantageous. This paper presents technique for increasing density by modifying shape minimizing volume. The PM characteristics such as flux demagnetizing force, energy product, air-gap are represented lumped magnetic equivalent circuit when thickness width increased same volume but with different shapes....

Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Kyu Hyun, Wonho Kim, Seung Joon Park, Manfred Wilhelm; Numerical simulation results of the nonlinear coefficient Q from FT-Rheology using a single mode pom-pom model. Journal Rheology 1 January 2013; 57 (1): 1–25. https://doi.org/10.1122/1.4754444 Download citation file: Ris (Zotero) Reference Manager EasyBib...

Irreversible demagnetisation of a permanent magnet (PM) at high temperature can be caused by the field distributions because stator currents. It prevented if thickness is sufficient. However local irreversible occur even The varied according to magnetic path. To analyse cause demagnetisation, authors introduced an interior PMSM (IPMSM), consisting V‐shaped and concentrated winding, performed parameter analysis based on barrier width position considerably related path using finite‐element...

The calibration of traffic microsimulation models has received widespread attention in transportation modeling. A recent concern is whether these can simulate conditions realistically. deployment intelligent systems North America provided an opportunity to obtain traffic-related data. In some cases the distribution data rather than simple measures central tendency such as mean, available. This paper examines a method for calibrating so that simulation results, travel time, represent observed...

We demonstrate that the sequential surface modification of a ferroelectric polymer insulator plays an essential role in both enhancement carrier mobility and shift turn-on voltage (Von) organic field-effect transistor (FeFET) for nonvolatile memory. The insulator, poly(vinylidene fluoride-trifluoroethylene), is physicochemically modified by successive treatments ultraviolet-ozone (UVO) CF4 plasma to understand how morphology hydrophobicity affect grain size, mobility, Von FeFET. In...

In this study, the losses due to time-harmonic current in a permanent magnet synchronous motor (PMSM) are calculated through co-analysis of time harmonics using space vector pulse width modulation (SVPWM) inverter. PMSM is typically used as control motor. The contains because inverter voltage not sinusoidal, and result, occur. These have negative effect on performance, which vulnerable heat. Therefore, for efficiency performance evaluation PMSM, it necessary consider harmonics. we present...

The interior permanent magnet synchronous motor (IPMSM) is usually applied to the traction in hybrid electric vehicle and due its high-power density wide speed range. In this paper, IPMSM with concentrated winding for a 110 cc motorcycle introduced. Its design was improved high efficiency operation output characteristics were also analyzed according partial magnetic saturation of shoe web many variables. Because affects harmonics eddy current loss magnet, it confirmed that significantly...

The design of a motor with large armature reaction, such as the electric vehicle traction motor, can be implemented using trial-and-error method based on finite element (FEM). base model-design that uses conventional magnetic equivalent circuits is quite inaccurate. To avoid inaccuracy, this study proposes accurately calculates inductance values at practical operating point considering control issue. achieve objective, flux linkage due to current phase angles in each section modeled...

In this paper, we propose a goodness factor that shows how the output density of Spoke-type permanent-magnet synchronous motor (PMSM) is improved than conventional surface (SPMSM). The application factor, which defined as ratio total flux between different configurations, enables comparison SPMSM and spoke-type PMSM. A performance analysis two configurations with same rotor diameter, air gap length, stack usage, materials was performed using proposed factor. order to improve prediction...

In this article, a process for reducing the electromagnetic vibration and noise by changing shape of stator is presented. Although fundamental wave air gap magnetic flux density contributes to average torque motor, other spatial harmonics which were except that cause enfeeble output motor. Therefore, it important reduce performance Through proposed process, possible obtain an objective function specific assigning weights each harmonic. The reduction in minimized have adverse impact on...